Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '940ea41ae0dbd7ef772111c9790647eb38cbcf50bc00ccee7e11898209808ee1' 
  AND token = 'cSbBpWmFvYRcACy9/x3Tfhh7uRCBzPRaFGxrULyhlhg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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