Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e67998025252220e02acc60b4326982dff06104800a371854bfb1380cbee013' 
  AND token = 'i/E/JR8CGhLbj3aT69oAB1ahBTstqbJOWg7Od+6ovgg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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