Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27aa6d31f30a03f3e4277fd9c6e8fb59ebb77ad9bca60f8d400e81fa6c5d9e8a' 
  AND token = 'Fy1Ejalv6YfpWUkd/4C0UtZBQEci9d8AJjGBs6WIVhs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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