Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7fe5bb985ecb509456c879a7fec458efb88768f018e9e100a9bd070e42a46c77' 
  AND token = 'C52XB8vy/moQbD4ROq8YjM/LFiYDuhMbFBhBFYJhdKc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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