Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2410e7bce483162db570ee3810c5787825bc7545a65272e5801de9e735060cc1' 
  AND token = 'XGHjcomW/JUIiayiSMEmCjlprQmst/PSTrFI5petrs4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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