Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '7c5030cdbb13692b093cc76d351e3fd9aceb07a684d1fdb06fc32f7c0f883dec' 
  AND token = 'UnTSxXrjUehx0v6FU7qmI3iguJQFI7TkiwtpuisrLnA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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