Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '564a8240364897c4fb456d1f074c505b710687a34f7ffbd3ddf241f1ed6161d7' 
  AND token = 'YUhaqfPkNqUE4Qtbr7mcYppqbRuCaoaKUDH6mXBPNUE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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