Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '40e9eebaf0b023127d643dc99ac79e8048af6cec03e35fa78853974d7db3560f' 
  AND token = 'HTKVVsTbMzDFm+qwzVbZR4bdVpStxnTQcdA00nskKpw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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