Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3ee138f423af9a2b8430a0519500660c8f46309573ccc4420792b4640bcf4671' 
  AND token = 'mzf/0nioBOEH2aA5jaMFUuq4Ez9gqIcqmHTx+wXRnLw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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