Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e0a74567f85741f8e7a6720c79daae0c3173264cc7e4adddd36edbfcc06e523' 
  AND token = '7jRg0aYEUZ+mghbGXdJYdryeA1yl5emYGaJO4Ps8mjE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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