Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2fac17ef37e3c91ea08045d4ac57277413bf1d627660f65d55faae8ff0d90641' 
  AND token = 'P6h20sOAF8wHiWVkX2JOw1DaYinbzUlrQrUYY88AGcY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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