Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9f321431ad895f1ace6e4ee09015bb020d9dbda7b75d5dac9f79a596d0c2920d' 
  AND token = '+wwEcWOkcEmjRI47lR6/qyb4IYvnW0xnqOLnchB5Q6o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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