Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa004e95db6a14f8ba2902e6b563cbf175bb8f9f3b72b1062cdf39488f01dbe9' 
  AND token = 'bgd4fAPA2fGLTtmZr46ZVQDW4y9kO6l/gtHVKy3SmU8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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