Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8a71dce43d76da8ad1792aba0f6e47ffe2e836127c1b3420d2eccc00db217341' 
  AND token = 'vp4HDq3/1gMsSsOFSq0FVih5Uilm1HTYHSMMAAo2uvc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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