Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9678630fedfbefd8c959d404d887063299d35fa9731ed93a6d62f8624af752da' 
  AND token = 'pFbiddVWqB47iOpvr0r6ZphD4llgjoooMgJDFp461NM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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