Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '29f255e6105f27e4c15c057955cb2df8143002b4ac5c90429a58107bf6d9d459' 
  AND token = 'B4ZgfhVMfc8e2Myz/pVTPcZmP3OhI4KAPUQYn5zxw+g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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