Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '56970379e59ee13368ddd8162863f4f658f32250f5e56e71197b78430bdfd1d6' 
  AND token = '5lrZ9elr+0+kPXsBsZsG1dhcH/NWdXpAQean7tRPpBE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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