Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6db7be22e61a63e08e365c8039acfa5156fd0fa7985475e4d76773f576e69cef' 
  AND token = 'QOg3tO+1bVEg39gJkQmbKU2o2PDouQ/Zy3Ss9wTozsw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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