Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e58c97352d39123f8fe17f598631a0539e4cf252ae7d18fcb92fc691d9de40b2' 
  AND token = 'pWC7OleJMfgVtcw7GwJwNR3kkVuGla5cVeegNkvvK5k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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