Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '50443f6e871e4d9f7a54cb9376114df02051bf2d12c01c851e57a12718f5194c' 
  AND token = 'JSWQC92E47xCuDIs8EWYs1Z2d4Inv5BLgc1W250hws4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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