Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f6516a3597f0f9d2f1803cb776f46af33aa415e8287c98ce1d41a76b588ffca3' 
  AND token = 'EpVhJEKDGhB3puXhjMML4fR3jG282MelEdYTM0PeG6I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}