Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab1c16ef466eb5b5ed0d203c9a6e6d9e8e60acda6880b93c2e65cc2b46d1394c' 
  AND token = 'fbHpoanAlZNn81ZptaKE/kbNt4RmMgBJgz9aYdi7sUU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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