Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3b8224ffcaf15b528618cf4fa9450b41357d54df085b49351a1ebe30de29afb7' 
  AND token = 'Ub7qZhE0csamO8Wi25QvERvIvvKWrH0UnqIPioOoJyA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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