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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8862fe22c497932041c85426bd6f3767e1b92a7556c77bf69608f701349044b7' 
  AND token = 'P0zw/8wkLWCatW5n6vpEyHC5r9z92IIBTHhzLSgJTXk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}