Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dedf6b36c647725a4c5608e937cc3796023948686b2fbf58c367b8a50da3fbf4' 
  AND token = 'u66Z2PH+JoxHHx655fAxQSWxnaTXZ8Tb5SZqaNP+qI8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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