SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '26f779556d8d551fef6b5f1054f552fb5f3f8eb0cf174d7f15c2e5c7f2c0641b' 
  AND token = 'jzuaXDsgQu0iWgvJSlBShKMO+sCkcy5Dv3OZ9Dqljlk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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