Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1aab507e1c602262cdb1d5525ceaf58753114db51c4dba030f45446b9e15eccc' 
  AND token = 'XD6SbI/PiRsYhgbOkSUlgTLrwzWJn+wlRqspm3E9B3s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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