Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd488c763b48703299631e5544c927a31419df01b1aace6c8bb0ecf1039580c2' 
  AND token = 'Ni0zxN6SQoI/TUmWFSNyrSdPT100kKvYfVhMD81uEaM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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