Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a9c91e218be04d65dab4bb4ce09c338b2e0be827ec3f66f5cb63e399f96bf01a' 
  AND token = '6Cd+HsXxNKKlKcfhujDt4G6F13/r+4iHsjCvt+4sb2o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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