Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b3e7eb5afd0edb63a5064487bb0096444861869784df1ed7e3ada57369b23dc1' 
  AND token = 'hJpU1gC36QRoIsySzpelI24wsLQqPwishczFNJTKrgA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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