Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dedd3a9244221d4052a94191c773dbd6669b01b22abd0674a44f30652974e4bb' 
  AND token = '9L68n7M941YwaIYmDdU8TCb8/SKhLKq69LjxmzqKEGM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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