Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13938849f4a8298eae407e3a81f7516e03ede3d15791cc88bc109fbe721c44d0' 
  AND token = 'CPsxJ5mhaqFBPvqETfJsSZaNiaVy+Vg+5Il8e/sn3tY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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