Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b4384a60c030537cd6d53c001f23407941d927dffb97e1a197e0a8059f4cc7b' 
  AND token = 'Lb1UOfGLo8l8+pWyLeX9SIAw62lC771DE+aaKWSpQK0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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