Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cdfafbf060b4df8ca483397467b0ab354734e37f5b7e8da608f0e69510da0424' 
  AND token = 'aBiH0/JiIvy/pMj6rMTCrPDiEPoAYFIDqKiljB6WBI4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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