Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0677af3aed543327a6e54cda12b542813282df0a242a3b1816587c0b488ace7c' 
  AND token = 'rhM9YI323VDy8xgD8UkNnwUV0F0EpOB/WWym/41BeAE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}