Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97aaff9d315fdd4a4563ce9adda70a70045849ad57c4883a25052b75a6e3046e' 
  AND token = 'R6TA0QfDsLEDLLBVuFGblMS8pZU7yTbj4OhwD2NMCj4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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