Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '386f115b0f7f1133f81e2cc8a39dc53a569a6f8051f6795e3d81d7823c7130c7' 
  AND token = 'IEiozXu2tY+zD+0XOPQHJFuLB7OLgP6FPdiSZ/w9cSk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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