Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '221c104521557493eab74f4083a64001c278603a305ce20f8f86a4a463e7637f' 
  AND token = '8CnawuZCcq7I7QWXmCfMywSwsSDY7cyaf04xMW3Rfz8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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