Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b85d55dc1c42158f9b7f30726444834c46e8a1deb65e81fb6f6071b4ecbb919' 
  AND token = '9l7qnv3Gbhe4k4IvK8sl5kHIlFj9xzs67Uyxo0r18kQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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