Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8cef1e7a80484c0177b5ff3d3fbe44336cd89c4da060016bfd2cdb03e2d16092' 
  AND token = 'n+M//dUcCRKj7ld4FRXBRU/O6A5QOZVNwod+fTajWF0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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