Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '43faf828259c5dd7557c0bb87c98bd11ca7861390c204ce1b9587007b6f4b1ee' 
  AND token = 'oUHNOqnmMsV3ZcVU0asO0+r1Yp13TxDuKnT4aXMSdOE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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