Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3243c425f8d074d1c1bf68da4818e6eb2374fb096c687aa6ac0522532e7a840d' 
  AND token = 'U2vHRm37CAgwgaRGCiQLTbNnMnpXAnn0EYw6cmEGmN4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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