Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '791da1f5d4d6d990703f85bd17ae2c29222910652cdfcd7c7970275427ad8418' 
  AND token = 'WtVNZ9ukVMvgcrFqOD0Ceq9XIlbrISt+pqmx7/RkGeY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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