Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ac5f3b53a068be70b9796f1a3fa30f7cfceeaccdeff3fac938143da5363d3494' 
  AND token = 'f3c0xqpEaQx1iSZGUTQ2bXdCv7k/KVQ/loNafsiTo/I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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