SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c237ea7196fd88e9a1fb0087d4f2a038eb35edbf36a2f8d561b1fb493db1ad9f' 
  AND token = 'KTOmWszXEDw9+JGpvFNOvmhLLS8cFrirDU+7dqMZH48=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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