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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9820ed26e8e01a807bdef0e88dd1e33741f821e0c7a9a3174c1c4b5c8a2ec46' 
  AND token = 'Bu2tTDhqCb4wBXkyuEdseOiwl9MyS5jBU4v21TobchU=' 
  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"
    }
  }
}