Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3721e12233aba5ce8ab8b3743cfe3ad8c1cee9d5443543cac0e482b931fb28e4' 
  AND token = 'sAgHfR+v87kYyY/q7daev8+/zasoHhxqX/2uo/RQBQs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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