SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'e33436d0427cef950d6a3abd98c44653a2d69f4e24684c8148350a873f784409' 
  AND token = 'mLfaW/bXuZS1k7gZZqoQkA7dNQCnYRhkYFKEgLLS/3U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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