Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc65c413f6a542589d4723880b10c5cf70930853267c9c2bb5453e39ec3f07c7' 
  AND token = 'RSfWbVKixhfWjNeWmB+qaZ30Nxo+G6fm7W4x8nJ9HiM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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