Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'a6f5afdde35f868be90eef57c2ca1294da05ac74b25607b886ef01380d4bae04' 
  AND token = 'G9X7cqEJ0edutR0BOi1HXjV8DVVGWnWF7IA7wPfDVGo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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