Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3b2002ec68754a3563f2415d9a381d0026281824bc90133f1792b64f770d9915' 
  AND token = 'Rc6yneaYP1/5yDGu5qlPtDVjj58QkyW2CT1RKaS7id0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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