Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b13975981d500b870907c6c6398ba568bc5635130b7d8c25196038bedd160e9f' 
  AND token = 'bV8OrL9AAy79R+ow0h1+Hvh4Gz4RgOgcE0n0+EhYS6E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00076

JSON explain

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