Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d6d7629fbdd2a30f84523c63347759e75b440b04c310facf4936d31303e64f5' 
  AND token = 'RnAWqDpfkebfK4FX+y5XWVF2aOcf8g7TpaBQx31yzUE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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