Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25280c2a70f9a43f0fd6cf537f3fcb6862844d79d3bdd9aa67beaa96a0a8a99b' 
  AND token = 'dr9wP2VxM2cHyu1Yy82CwS+hhtNodasDXMdk07QjPhk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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