Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '502f1d371fc173c03227ba57062beb2576d42214f38421dd42f59bdd4a2362a2' 
  AND token = 'r/yxj6YQAMhYa4nSsJTV46smKg4kw7ZtWqWWOD8D8DU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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