Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '78a503426a2d224c5cac176ed490dae6deec92d42e7094c46e2a9d22e430c67f' 
  AND token = 'ZnxHstLJWWIFtBXAjeqTue5EUlD/ZIZmOCMwear0PYw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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