Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba6559f55e2ffd98c416ac41cbc08cfab1914fe3c5521560127871e44da921b8' 
  AND token = 'z34D2q+NC06HxWdVX+qJf4uJpVZXN8lDAyrG0pbI5DE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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