Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a03cc7743348a518470f2acc8645f81e68525a44a192d983a73c66679a92aacf' 
  AND token = 'gaAmKPKz/KaBmE5wz6I483CBXkW9KqmTZJEhyk7TauU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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