Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd9678cc867f9208e1524217ba0077fb15d5e40df919a5c1b4e6f9db63f5cae6' 
  AND token = 'xU3zWc58X9EVsaCyYV8xp0zeL5RF3UzUhZrykkoWm/0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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