Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a5da804ebece5603e22ed946e562fd8196f8390dbdeb4792b5486901a6c972ee' 
  AND token = 'utqyon7raBfnLNzO2LFDw4XAUkUNsEiVIF0ywSUkMhA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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