Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d781bf177464ac34656fcde15b8fca3cac299f8da2a82c5cad3f2eee9b3bb6a' 
  AND token = 'DE6aDJyci8622KNoBkq25iALtiH4W9YX733qm7+LeXk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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