Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b8cc02bbc64734dfacb02c749087080536fbfb1b7889f096a3f08dc9d13bf20b' 
  AND token = 'Cm8ZSpPFL8o4g9iKeKn5lfzvaIBjssUecZzKbl3Z0j8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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