Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b4e062d7676aeedfdc63cbb0dd93f64c2afb4397f281a9324249557ef38cc61' 
  AND token = 'v1fI89/dNf7uA7BqPn30NRNi7zTaZHMVOC73X8csjSE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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