Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ea59f2332fe61b280027875a4a2896f9f30b37a3f38d3eee19f9da97c94c668' 
  AND token = 'r48PJ+BocRyUMjmOOwO2GJWFH3VHc4y1Ry0Mtq+GC0U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}