Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'eb89ba87518a3f54704ff7fb4becbfc7e01ae53134906bb8e4e66b5e70027a9c' 
  AND token = 'lf1S6Pe1huCWAovnVuG/4nNqvMgWOj3IKhMyjeSk4Qc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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