Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4383ff4ca8e6373cf5b8e17a82e5a7c09e1fae8e4fe1c12627c2f1a2b991c70f' 
  AND token = '4nyW6xqUD+PKE4CcvVfo7Mp+y68VYRfkFDNIg4JsgL4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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