Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6d05d1b660863ad522028c175dd59061f04a65a832dbab6d1cb8fd095a245fed' 
  AND token = 'mtnIbCfAnURfp2yc+8mSIVx7VyAztcHZNrtup7FC24A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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