Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '127c32145222f51880581fd8908e1afe13d565605b8076ce44de8c2dcdfb0772' 
  AND token = '1X+yreC3Ee5lguHUKLfUm9r6s5T53jzMd4G86Z+Y0pw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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