Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e15f055c12d79bc9fd201f8f20acb8396f6c97a1dfe9f939e60d6f46fdf7cab' 
  AND token = 'aro4Oh2CKod00UXOtQ24bUU2N2XcDss6pAEKvuwZITM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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