Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '40a87631ee98ad88cd2a41634a34d2b14c492f1fd200790be2a071cf021b16c3' 
  AND token = 'l/u4qdvlDaXrfhdqwai+qWSQe1cVdk2DRoukjzotyG4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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