Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2879dde263a313df340e2eacd1acb3083ad94b2d4241ab25ce3fd29e4605ec61' 
  AND token = 'Fq2ms0tr5SiRYo51D9olZNTpJakFFFn4CPzUFQolEPM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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