Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '82cb4142ea208c660640b7f32b7a8332f2d0da37ad6e16c28de161190e1eaf57' 
  AND token = 'wpcaoEpBdXkxZ3fYffu4aBAELB9zzbp7ya2Dl/G7qyA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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