Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '55acce2d04e419d39cf58b073d464e285374a55a7fc4a1f262ca5bd14ee25964' 
  AND token = 'A3gFiMbZkQ+Vn5i5j8ctZA+VvlvDvIP6bKpMFlV8Yc0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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