Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0672fcf9e09fe042344919b8900698a598fd1b20bd511dac8fb0ff18e2c17c9d' 
  AND token = 'OoFaIBzh94NYrA2xcVVViESPIKTIf0u/gZ5yVDgQuH4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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