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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c6762d048a9b43b1d096f4fc19a20e17bc508927135f133d48e61b10591e3cc9' 
  AND token = 'VjMBw4d/l1kNBpRle6D1WUqV0Y9S8kL+Dp7K/MxfH+w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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