Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '284bc896ae10a650f65804853608c4c46a4f90e6dc631d18270212a482b1f334' 
  AND token = 'qVYLIrfwth0cGNYmqOCHhJsAM6gC+evfR7lEUNMISTk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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