Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '20b1eb96a4bf8a92cba4980f3417a37f83ac0e4f5d6733ae79acd676079e656c' 
  AND token = '9t5M/VinWWxFoacKtOVxtSJCC0XQLrnkZ7qCOZD2cmM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}