Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4d0fe32022e79bf365a007db56547f4d09cb5e5d8f3051e022339f784b3e8dca' 
  AND token = 'K14OQgy9Kp2wvENNmMgJitL7YR06UOTnBbXlbzz8EP4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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