Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c10b27f42fa4e7047f1fdf39316f1fd80017f546e55bb225d30890be51f4ce1c' 
  AND token = 'dgNHa+SnF+h/2yJZavM6ZwUptBrGIgd4NebuZIpdSLs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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