Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f5202f3084ba083da043212a0ca23616aab37ae01005f8fe3f59ef23af76af5c' 
  AND token = '1kvTQ5CNvjhhWmzCenr6d00vjCcPbnW/yfhtO0BJq0Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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