Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '638925fc9f9c77946a7506721923f386fe6cd182adfecd2828a3db8a7c3400f0' 
  AND token = 'CpkCbDyao9APCcSbEqqF+3wb/YDW055fzZaQ7UWyvXU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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