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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7a2d3727a3d11472aeb8ac60e9bbcfb112a2ccfb90503696cc7bfe10a8dfe93c' 
  AND token = 'B4YPMPIV04CZ3qjX/yoz442wdLS2ikPyiBr1tE+fizE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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